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pressure drop     
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  压降
     Basic Equation and Pressure Drop Calculation for Two Phase Flow
     两相流动的基本方程与压降计算
短句来源
     Comprehensive Analysis of Effects of Various Geometries on Two-Phase Friction Pressure Drop
     几种几何通道两相摩擦压降的综合分析
短句来源
     THE CALCULATION OF THE PRESSURE DROP FOR THE LAMINAR HELICAL FLOW OF POWER LAW FLUIDS IN THE ANNULAR SPACE
     幂律液体环形空间层流螺旋流的压降计算
短句来源
     A STUDY OF TWO-PHASE PRESSURE DROP PREDICTION MODEL FOR A SUBCOOLED BOILING CHANNEL
     过冷沸腾段两相压降预测模型的研究
短句来源
     PRESSURE DROP METHOD AND NOMOGRAPH FORDETERMING FIXED VOLUMN CONFINED ELASTICDRIVE OIL RESERVOIR GEOLOGICAL RESERVES
     确定定容封闭弹性驱动油藏地质储量的压降法和诺模图
短句来源
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  压力降
     The author presents the correlation equations for calculating flooding point (U_F)、pressure drop(AP/Z)、HETS and minimumreflux ratio(R_M)、optimum reflux ratio [R_(opt=(1.16—1.38) R_M] etc. which can be applied to chemical plants.
     本文提出了液泛点μ_F、压力降△P/Z、平均等级高度HETS和最小回流比R_m、适宜回流比(R_(opt)=(1.13—1.38)R_m]等计算关联式。这些计算式可用于化工生产中的有关设备计算。
短句来源
     The efficiency of removing oil was 53%~78% when the water phase pressure drop was about 0.2MPa,the average oil concentration outside the normal decompressor was 137mg/L ,the problem of excess standard of wastewater induced by mixing refining the imported raw oil containing much sulfur was solved.
     在水相压力降约 0 2MPa时 ,除油效率为 5 2 .8%~ 78.3% ,装置外排污水平均含油浓度 137mg/L ,解决了常减压装置掺炼进口高硫原油所引起的污水含油超标问题
短句来源
     The flooding rate and pressure drop of hydrogenwater liquid phase catalyst exchange bed with various packings are discussed in 50 mm×680 mm and 20 mm×290 mm glass columns.
     在50mm×680mm和20mm×290mm玻璃柱中,用氢 氘水研究了催化交换床层不同填料的液泛及床层压力降的变化。
短句来源
     Pressure drop for flowing mixture of sized sand particles in water through the leacher has been measured, when the equivalent diameter of particle is 0.194, 0.210 and 0.298 mm, the volume fraction of solid is smaller than 0.14, and the flowing velocities between 0.1 and 1.3 m/s, the operation is stable.
     用当量直径为0.194、0.210及0.298mm的分级河砂,在固相质量分率为0.02~0.30(相应的固液流量比为0.008~0.14)、水的表观流速为0.1~1.3m/s的范围内操作,测定各部分的压力降,即使出现沉积也都能稳定运行。
短句来源
     The total pressure drop of the converter system was controlled at about 6. 7kPa with a utilization coefficiency of catalyst of 236L/(f·d) and a stable conversion of 96. 5%~97%.
     目前,转化系统压力降6.7kPa左右,催化剂利用系数236L/(t·d),转化率稳定在96.5%~97%,并取得较好的经济效益。
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  压力损失
     The removal efficiency of H_2S and C_6H_5CH_2COOH at various inlet concentration ratios,the pressure drop of the bioreactor at different gas flow rates and the effect of the gas retention time on removal efficiency are investigated in the experiment.
     主要考察了不同进气浓度比例下H2S与C6H5CH2COOH的去除效率,不同流量下的压力损失及气体停留时间对去除率的影响。
短句来源
     Experiment and analysis of pressure drop characteristics of flexible duct in air conditioning systems
     空调系统柔性风管压力损失特性实验与分析
短句来源
     The results show that under pure gas flow condition, when the cross-section gas velocity of calciner ranges 6.0~8.0m/s, the pressure drop of horizontal cyclone separator varies in 80~200Pa, and the pressure drop of whirl separator is around 600~1180Pa.
     研究结果表明:空载下分解炉截面风速为6.0~8.0m/s时,卧式旋风筒的压力损失约为80~200Pa,旋流分离器的压力损失约为600~1180Pa;
短句来源
     Comprehensive test study of pressure drop in a hydrocyclone.
     水力旋流器压力损失的综合试验研究
短句来源
     The results indicate that the separating efficiency is more than 98%,the pressure drop of the separator is less than 100 Pa,and the abrasion is very little.
     结果表明,同轴双锥两级气固分离器的分离效率在98%以上,气固分离器的压力损失在100 Pa以下,设备磨损小,能够满足下行循环流化床反应器的要求。
短句来源
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  压差
     There was a curvaceous relation between the pressure drop (_△P=MAP-DCP) and CBF [CBF=37.63-0.42_△P-0.0006(_△p~2)].
     DCP与MAP不相关(P>0.05)。 狭窄两端压差(_△P)与CBF有曲线关系,其方程是CBF=37.64-0.42_△P-0.0006(_△P)~2。
短句来源
     According to onsite data and the correlation of sand production rate to oil properties, perforation extent, producing pressure drop and reservoir properties, the favorable values of the parameters controlling sand flow are derived, that is, oil density lower than 0.96g/cm~(3), perforation extent lower than 40%, producing pressure drop lower than 4MPa, shale content 10.5%-16% and porosity lower than 30%.
     统计分析现场资料,研究吨油出砂量与原油性质、射孔程度、生产压差和储集层性质的相关关系,确定油层控制出砂的参数有利值为:原油密度小于0.96g/cm3,射孔程度小于40%,生产压差小于4MPa,泥质含量为10.5%~16%,孔隙度小于30%。
短句来源
     It's injection rate varies as (3-n)/(1+n)th power of pressure drop,inversely proportional to the (1-n)/(1+n)th power of time,and cumulative injective volumes are proportional to the (2n)/(1+n)th power of time.
     其注入量与压差的(3-n)/(1+n)次方成正比,与时间的(1-n)/(1+n)次方成反比; 而累计注入量与时间的(2n)/(1+n)次方成正比。
短句来源
     As a result, the BF operation indexes have been improved,the pressure drop of stock column decreases 2kPa, permeability index increases 188m~3/(min·MPa), the blast furnace is in free driving condition, hanging and slipping don't happen, production increases dramatically and the consumption of coke decreases obviously.
     使用该烧结矿可使高炉操作指标得到提升,昆钢高炉生产条件下,使高炉料柱压差降低2kPa、透气性指数提高188m~3/(min·MPa),高炉炉况顺行,无崩挂料,高炉增产节焦效益显著。
     A NONLINEAR ANALYSIS ON DIFFERENTIAL PRESSURE DROP SIGNAL FOR GAS-LIQUID TWO-PHASE FLOW
     气液两相流压差信号的非线性分析
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      pressure drop
    Both the separation efficiency and pressure drop of the cyclone were measured as a function of the inlet velocity and operating temperature.
          
    At the same inlet velocity, both the separation efficiency and pressure drop decrease with increasing temperature.
          
    The pressure drop of a cross-flow moving-bed was investigated in a two-dimensional rectangular apparatus.
          
    The experimental results show that the particle velocity has little influence on the pressure drop, while the phenomena of cavity and pinning occur when the cross-flow velocity is high enough.
          
    The development of a cavity or a raceway can result in three types of variations of pressure drop with time: stabilization, slight fluctuation and severe fluctuation.
          
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    A theoretical analysis of the laminar flow in the annular space bounded by two concentric tubes with small injection and suction through the porous walls is presented in this paper. By using a similarity transformation, the Navier-Stobes equations in the cylindrical co-ordinates for the steady incompressible flow are reduced to an ordinary non-linear differential equation of the third order. With appropriate boundary conditions, this equation is solved by the method of small perturbation. The results show that...

    A theoretical analysis of the laminar flow in the annular space bounded by two concentric tubes with small injection and suction through the porous walls is presented in this paper. By using a similarity transformation, the Navier-Stobes equations in the cylindrical co-ordinates for the steady incompressible flow are reduced to an ordinary non-linear differential equation of the third order. With appropriate boundary conditions, this equation is solved by the method of small perturbation. The results show that the velocity of injection or suction and the two radii of the annulus affect considerably the velocity profile, the pressure drop in the flow direction and the friction coefficients at the walls. When the suction is applied only at the inner tube the position of the maximum velocity moves inward. The friction at the inner wall consequently increases and that at the outer wall decreases. It is also found that in the case considered the suction reduces the pressure drop in the flow direction.

    本文对具有微量吸吮或吹注的二同轴心圆管间的层流流动问题进行了理论分析。利用相似转换,将不可压缩流体,定常运动,柱坐标形式的纳非尔-斯托克司方程组简化为一三次非线性常微分方程,运用小参数法及适当边界条件求出此方程的解,结果表明,吸吮或吹注对流动的速度分布,沿流程压力下降和摩擦系数均有显著影响,其影响的大小,依赖于吸吮或吹注的性质,程度及二圆管的相对尺度。当内管壁具有吸吮而外管壁的吸吮为零时,最大速度的位置将向内移,随之,内管壁的摩擦系数值增加,而外管壁的摩擦系数值减小,同时,产生较小的沿流程压力下降。

    Chrysanthemum indicum is effective in lowering blood pressure. Extraction with hot ethanol yielded an active fraction, HC-1. In anesthetized cats, intraduodenal injetions of 50—100 mg/kg of HC-1 produced an average "% of hypotensive areas" in 2 hours varying from -19% to -22%. Four normotensive dogs were fed 50, 100, 130 and 150 mg/kg resp., and the diastolic pressure dropped 0, 24, 8 and 36 mm Hg resp. The hypotensive action was slow and lasted more than 2 hours. Three renal hypertensive dogs...

    Chrysanthemum indicum is effective in lowering blood pressure. Extraction with hot ethanol yielded an active fraction, HC-1. In anesthetized cats, intraduodenal injetions of 50—100 mg/kg of HC-1 produced an average "% of hypotensive areas" in 2 hours varying from -19% to -22%. Four normotensive dogs were fed 50, 100, 130 and 150 mg/kg resp., and the diastolic pressure dropped 0, 24, 8 and 36 mm Hg resp. The hypotensive action was slow and lasted more than 2 hours. Three renal hypertensive dogs were fed daily 100 mg/kg in the first 2 weeks, and 200 mg/kg for the 3rd week. Weekly tests on EKG, serum BSP retention, and blood NPN revealed no serious alterations. In two of them the blood pressure was brought down significantly. Daily feeding of 300 mg/kg to one healthy dog for 3 weeks brought forth no grave reactions except vomiting at times. HC-1 is marked with (a) high yield, (b) low toxicity, (c) mild action, and (d) certain hypotensive effects in anesthetized and unanesthetized animals. So it may be recommended to clinical trial.

    野菊花降压有效。本文实验用热醇提取出有效成分HC-1,并研究其疗效及毒性。麻醉猫小肠注射50—100毫克/公斤,2小时内的降压面积百分比为-19至-22%。正常血压狗4只,分别灌服50,100,130及150毫克/公斤,舒张压分别下降0,24,8及36毫米汞柱,作用缓慢,维持2小时以上。慢性肾型高血压狗3只,前2周每日灌胃100毫克/公斤,第3周每日灌胃200毫克/公斤。其中2狗血压显著降低。这3狗每周作心电图、血清磺溴酞钠存留率及全血非蛋白氮含量的测定,未见到严重毒性反应。另1只正常狗每日服300毫克/公斤,连续3周,除有时呕吐外,亦无其他严重毒性反应。 HC-1产量较高,毒性不大,作用缓和,对麻醉与不麻醉动物有一定降压效果,可以推荐临床试用。

    The LD_(50) in mice was found to be 19.4 g/kg and 0.98±0.075 g/kg respectively for the infusion and crude extract of Chou-wu-tung, given by intravenous injections. The subacute toxicity is negligible when the infusion was crally administered to rats (0.25—2.5 g/kg/day) for 60 days, except that some animals showed quietness, slight fall of systolic pressure and soft stool. No apparent toxic effects were observed. A crude extract and infusion of Chou-wu-tung, when injected intravenously at respective dosages...

    The LD_(50) in mice was found to be 19.4 g/kg and 0.98±0.075 g/kg respectively for the infusion and crude extract of Chou-wu-tung, given by intravenous injections. The subacute toxicity is negligible when the infusion was crally administered to rats (0.25—2.5 g/kg/day) for 60 days, except that some animals showed quietness, slight fall of systolic pressure and soft stool. No apparent toxic effects were observed. A crude extract and infusion of Chou-wu-tung, when injected intravenously at respective dosages of 50—100 mg/kg and 150 mg/kg, produced primary and secondary falls of blood pressure on anaesthetized rats and dogs, but with intramuscular injection or oral administration, only the secondary fall of blood pressure was apparent. This hypotensive effect might last for 2—3 hours. Intravenous injection of the decoction to anaesthetized animals produced only primary fall of blood pressure, the infusions of alcohol, ether and ,chloroform, given by the same route, did not lower the blood pressure. Twenty-eight renal hypertensive rats were divided into three groups, the first (11 rats) and the second (7 rats) groups were treated with the infusion at respective dosages of 0.5 g/kg/day and 5 g/kg/day, and the third (10 rats) with the crude extract at 50 mg/kg/day. The drug was given to all the rats for 2 weeks by oral administration. Hypotensive effect was observed in 3—10 days after medication, and became more remarkable in the second week of the therapeutic period or the first week after cessation of medication; the blood pressure dropped 57.4%. The blood pressure in most rats returned in 2 weeks, and in some rats in 2—4 days or 4 weeks after the stopping of medication.

    1.本文就臭梧桐的一般性质作了实验性研究,结果证明其降血压成分易溶于水,难溶或不溶于乙醚、乙醇和氯仿,对热稳定,在碱性溶液中可被氯化钙沉淀出来。臭梧桐降血压效果可因产地而不同。开花前的和新鲜的臭梧桐降血压作用分别较开花后的和经长时间保存的要强。 2.臭梧桐毒性甚小,其热浸剂和提出物给小鼠静脉注射时半数致死量分别为19.4克/公斤和0.98±0.075克/公斤。给大鼠每天用热浸剂(0.25—2.5克/公斤)灌胃经60天,除少数动物出现安静、轻度收缩压下降和大便变稀外,未发现其他毒性反应。 3.臭梧桐提出物(50—100毫克/公斤)和热浸剂(150毫克/公斤)给麻醉大鼠和狗静脉注射时,可引起两度血压下降,但肌肉注射或经口给药,仅引起第二度降血压作用,其作用可维持2—3小时。静脉注射煎剂(麻醉大鼠和狗实验)仅出现第一度降血压作用,经口给药时无效。乙醚、乙醇和氯仿的浸出液不论静脉注射或经口给药,均不引起麻醉动物的血压下降。给肾型高血压大鼠每天经口投予臭梧桐热浸剂(0.5—5克/公斤)和提出物(50毫克/公斤)时,给药的第3—10天卽口出现血压下降,在给药的第二周和停药后的第一周,血压下降最明显,最大降血压作用可达原值...

    1.本文就臭梧桐的一般性质作了实验性研究,结果证明其降血压成分易溶于水,难溶或不溶于乙醚、乙醇和氯仿,对热稳定,在碱性溶液中可被氯化钙沉淀出来。臭梧桐降血压效果可因产地而不同。开花前的和新鲜的臭梧桐降血压作用分别较开花后的和经长时间保存的要强。 2.臭梧桐毒性甚小,其热浸剂和提出物给小鼠静脉注射时半数致死量分别为19.4克/公斤和0.98±0.075克/公斤。给大鼠每天用热浸剂(0.25—2.5克/公斤)灌胃经60天,除少数动物出现安静、轻度收缩压下降和大便变稀外,未发现其他毒性反应。 3.臭梧桐提出物(50—100毫克/公斤)和热浸剂(150毫克/公斤)给麻醉大鼠和狗静脉注射时,可引起两度血压下降,但肌肉注射或经口给药,仅引起第二度降血压作用,其作用可维持2—3小时。静脉注射煎剂(麻醉大鼠和狗实验)仅出现第一度降血压作用,经口给药时无效。乙醚、乙醇和氯仿的浸出液不论静脉注射或经口给药,均不引起麻醉动物的血压下降。给肾型高血压大鼠每天经口投予臭梧桐热浸剂(0.5—5克/公斤)和提出物(50毫克/公斤)时,给药的第3—10天卽口出现血压下降,在给药的第二周和停药后的第一周,血压下降最明显,最大降血压作用可达原值的57.4%。多数高血压大鼠的血压在停药后的第二周恢复,少数在停药的2—4天或4周后恢复。

     
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